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Allowance for Credit Losses and Reserve for Unfunded Loan Commitments - Allowance for Credit Losses on Basis of Impairment Method (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  | $ 1,779 |  |  |
Collectively evaluated for impairment |  |  | 23,417 |  |  |
Individually evaluated | $ 951 |  |  |  |  |
Collectively evaluated | 25,037 |  |  |  |  |
Total |  | $ 26,201 | 25,196 | $ 22,858 | $ 22,168 | $ 22,302
Total | 25,988 |  |  |  |  |
Individually evaluated for impairment | 12,509 |  | 10,584 |  |  |
Collectively evaluated for impairment | 2,154,858 |  | 2,095,975 |  |  |
Total loans |  |  | 2,106,559 |  |  |
Total Loans | 2,167,367 |  |  |  |  |
SBA held for investment |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  | 115 |  |  |
Collectively evaluated for impairment |  |  | 760 |  |  |
Individually evaluated | 530 |  |  |  |  |
Collectively evaluated | 1,026 |  |  |  |  |
Total |  |  | 875 |  |  |
Total | 1,556 |  |  |  |  |
Individually evaluated for impairment | 357 |  | 690 |  |  |
Collectively evaluated for impairment | 62,150 |  | 71,614 |  |  |
Total loans |  |  | 72,304 |  |  |
Total Loans | 62,507 |  |  |  |  |
Commercial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  | 516 |  |  |
Collectively evaluated for impairment |  |  | 14,738 |  |  |
Collectively evaluated | 15,516 |  |  |  |  |
Total |  | 15,299 | 15,254 | 14,908 | 14,705 | 15,053
Total | 15,516 |  |  |  |  |
Individually evaluated for impairment | 449 |  | 3,101 |  |  |
Collectively evaluated for impairment | 1,255,583 |  | 1,184,442 |  |  |
Total loans |  |  | 1,187,543 |  |  |
Total Loans | 1,256,032 |  |  |  |  |
Residential mortgage loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  | 36 |  |  |
Collectively evaluated for impairment |  |  | 5,414 |  |  |
Individually evaluated | 147 |  |  |  |  |
Collectively evaluated | 6,290 |  |  |  |  |
Total |  | 6,135 | 5,450 | 4,786 | 4,284 | 4,114
Total | 6,437 |  |  |  |  |
Individually evaluated for impairment | 7,787 |  | 3,361 |  |  |
Collectively evaluated for impairment | 625,627 |  | 601,730 |  |  |
Total loans |  |  | 605,091 |  |  |
Total Loans | 633,414 |  |  |  |  |
Consumer loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Collectively evaluated for impairment |  |  | 990 |  |  |
Collectively evaluated | 845 |  |  |  |  |
Total |  | 1,022 | 990 | 803 | 642 | 671
Total | 845 |  |  |  |  |
Collectively evaluated for impairment | 75,990 |  | 78,164 |  |  |
Total loans |  |  | 78,164 |  |  |
Total Loans | 75,990 |  |  |  |  |
Residential construction loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  | 1,112 |  |  |
Collectively evaluated for impairment |  |  | 1,515 |  |  |
Individually evaluated | 274 |  |  |  |  |
Collectively evaluated | 1,360 |  |  |  |  |
Total |  | $ 2,642 | 2,627 | $ 1,603 | $ 1,596 | $ 1,390
Total | 1,634 |  |  |  |  |
Individually evaluated for impairment | 3,916 |  | 3,432 |  |  |
Collectively evaluated for impairment | 135,508 |  | 160,025 |  |  |
Total loans |  |  | 163,457 |  |  |
Total Loans | 139,424 |  |  |  |  |
Total |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Total loans |  |  | $ 2,078,631 |  |  |
Total Loans | $ 2,147,293 |  |  |  |  |

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- Definition The valuation allowance for financing receivables excluding accrued interest that are expected to be uncollectible that were collectively evaluated for impairment. + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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